Tu 14-3-520-2005, high-precision pipes made of KhN78T alloy according to Tu 14-3-582-77. Seamless thin-walled pipes made of KhN78T, KhN77TYR alloys

Technical characteristics

Tu 14-3-520-2005, Tu 14-3-582-77 regulate the production of cold-deformed seamless tubes with high precision made of CrN78T (EI-435) alloy working at 1100°C. The alloy is heat-resistant, heat-resistant and difficult to weld. Hardness after hardening HB 10 -1 = 200 N/mm2.

Substitutes

CrN38VT, 12X25H16G7AR, 20X23H18, N06025, 2.4951, NiCr20Ti, GH3030

Percentage composition of CrN78T GOST 5632-72

Fe C Si Mn Ni S P Cr Ti
≤6 ≤0.12 ≤0.8 ≤0.7 70.003 - 80.85 ≤0.012 ≤0.015 19 - 22 0.15 - 0.35
Mechanical properties (temperature 20°C)
Range GOST Size e.g. s in sT d5 y Heat treatment
- mm - MPa MPa % % -
Sheet, 24982-81 up to 3.9 860 35 Quenching 980 - 1020 °C, air cooling,
Sheet, 24982-81 4 - 11 880 30 Quenched 980 - 1020 °C, air cooled
Forgings, 24982-81 ≤600 Prod. 588 196 25-30 35-40 Hardening

Physical material properties
E 10- 5 a 10 6 l r R 10 9
Degree MPa 1/Gradus W/(m-degree) kg/m3 Ohm-m
20 2.24 8400 1090
200 2.13 13 16.7 8340 1108
400 2 13.8 20.6 8260 1127
600 1.84 14.7 24.8 8180 1135
800 15.5 28.9 8090 1123

Sv - Ultimate Short-Term Strength

sT - Limit of proportionality (yield strength for permanent deformation)

d5 - Tensile elongation at break.

y - Relative contraction

E - Modulus of elasticity of the first kind

C - specific heat capacity

a - Coefficient of thermal (linear) expansion

l - Thermal conductivity coefficient (heat capacity of the material)

r - specific weight

Supplier

The supplier Evek GmbH offers to buy cold formed seamless tubes at the most optimal price in the given segment of rolled products. We offer cold drawing seamless pipes from the specialized warehouses of Evek GmbH with delivery in any city. Full compliance with Tu 14-3-520-2005, Tu 14-3-582-77.

Buy, best price

Supplier offers to buy cold-deformed seamless pipe TU 14-3-520-2005, TU 14-3-582-77, the price - due to technological features of production without the inclusion of additional costs. The website of the company Evek GmbH contains information on the latest arrivals of products. The price is optimal from the supplier. Timely delivery is provided by representative offices in Eastern European cities.